Doorcheck



Patented vMar. 8, 1932 UNITED si -Ares A EN oIjFFIica WALLACE MOORE, or nnw nnrrnim, connncrrcor; nssrenon TO THE" nnalee HARDWARE conroRA'rIoN, on NEW BRITAIN, CONNECTICUT, a CORPORATION or connncr cur noononnci:

Application filed February:9, 1931. Serial No. 514,427.

My invention relates to. door checks, and has" special reference to door checks of the type which have a checking actionboth during the opening and closing of the door and f in'whichthe' checking action is accomplished by means of a liquid within the check cyhn v whereby-this and other objects may be attained, will be readily understood from the following description and accompanying drawings, in which, I Figure l is a longitudinal sectional elevation of a portion of a door check embodying the features of my inventionin their preferred form, the section being taken on the line l,1 of Fig 2; 1

Fig.2 is a front end viewof the check;

, Fig. '3 is a sectional view taken on the line r Fig. 4 is a sectional view taken on the llne 4.4;ofFig.2; p

. F 'g. 5 is a side elevation, partly in section, of a valve member shown in one angular posi- Figs. 6, 7 and Sare side elevations of the valve member shown'in: three other angular positions; v Fig. 9 is a sectional view taken on the line 99ofFig.5; e p 1 Figs. 10 and 11 are, respectively, side elevations of a valvemember of a modified construction shown intwo diiferent positions;

- Fig. 12 is 'a sectional View taken on the line 1212 of Fig. 10.

Thedoor check illustrated 'in the drawings is provided with a casing having a piston chamber or cylinder 2,. a chamber for the usual door closing spring (not shown) and a 5 pistonhavinga forward head 5 and a rear head 6. Each of the heads is provided with the usual opening controlled by a ball check.

valve (notshown); The piston chamber'i's provided with a bypass 10 extending longitudinally in the, forward portion of the wall thereof havingits inner end arranged back of the. forward head 5 of the piston and its outer or forward end adapted to be in communicationwith the piston chamber through a port 12 arranged close tothe forward end wall of the piston chamber. I The port-12 is I adapted to be opened and closed varying degrees by means of avalve let'of commoncom struction extending into the outer end of the bypass 10." v

The parts ab v referredto be of a well known construction. In accordance withtthe present invention,

a bypass .16 is providedin the forward por tion ofthewall of, the piston chamber parallel with the bypass 10,,and a bypass 18 is provided inthe rear portion of the wall of the piston chamber in axial alinement withthe bypass 18. The bypass 16 has itsrear-end opening into. the piston chamber back of the forward piston head 5v and its forward'end adapted to be incoinmunication'with the pis ton chamber through a small port QO-When the piston is inretracted position. The port- 20 is spaced a distance inwardly or rearwardly from the port 12 and is. adaptedto be closed bythe piston as the doorzapproaches closed position. The bypass 18 has its forward or rear end opening inthe piston chamber forwardly of the piston head 6 and its rear portion adapted tobe in communication with the rear. portion of the piston chamber through ports 22 and2 l. The port 24L is spaced close 7 to therear end of the piston chamber while,

the port'22 is spaced inwardly a distance therefrom'so as to be closed by the piston head 6 during the latter part of the retracting movement of the piston during the opening of the door. A cylindrical valve member 26 1' extends through an openingin the forward end of. the piston chamber in axial alinement with thebypasses 16 and 18 and through the bypass 16 with its rear end portion extend:

ing into the bypass 18. This valve member is provided with a collar 28 which is held against the shoulder inthe borethrough which said member eXtendsby a packing washer 30 and al packing-nut 34 screw-.

threadedinto the outer end'of .said bore.

may be turned but is held axially fixed and a tight joint is provided.

The outer projecting end of the valve member 26 has a fiat portion 36. A wrench 38 is made to conform to the shape of the end of the valve member and has an offset handle portion 40 so that it can be only placed on the end of the valve member in one pisition. The valve member is provided with longitudinally extending grooves 42, 43, 44 and 45 arranged ninety degrees apart.

Said grooves in the valve member 26 are so positioned with relation to the flattened end portion 36 that when the wrench 38 is positioned horizontally as shown in Fig. 2, the valve member closes the port 20 in the forward bypass 16 but leaves the ports 22 and 24 open in the rear bypass 18 the groove 43 (Fig. 6) registering with the ports 22 and 24. With the valve 26 in this position, during the closing of the door the flow of liquid will be controlled entirely by the usual valve 14, and during the opening of the door there will be no checking action, the liquid flowing may through the ports 22 and 24.

With the valve turned ninety degrees in a clockwise direction so as to cause the handle of the wrench to extend downwardly, all threelports 20,22 and 24 will be open, all of said ports registering with the groove 42 (Fig. 5). With the valve member in this position, there will be a quick closing action of the door until the "port 20 is closed by the forward piston head 5 whereupon the closing action will be retarded, the flow of liquid being then controlled by the valve 14. As the two ports 22 and 24 are open as in the preceding described position of the valve member,

there will in this position also be no checking action during opening of the door.

Upon turning the valve member a further ninety degrees in the same direction, the

' port 20 is closed, the port 22 is left 0 en and the port 24 is closed, the groove 44 Fig. 8) registering only with the port 22. Thus in this position of the valve 26, during'the closing of the door, the action will be the same as in the first position of the valve above described, and during the opening of the door there will be checking action after the rear piston head closes the port 22.

Upon turning the valve a further ninety degrees in the same direction which positions the handle of the wrench 40 in upstanding position, the port 20 and the port 22 are opened and the port 24 is closed, the groove 45 (Fig. 7) registering with the ports 7 20 and 22. With this position of the valve,

during the closing of the door there is no substantial checking action until the front of the forward head 5 of the piston closes the port 20, and during the opening of the door there is checking action upon the piston head 6 closing the port 22.

With the check a set of simple instructions may be furnished to show the four difit'erent positions the valve 26 may be turned to secure the desired checking actions. By turning the valve 26 to positions intermediate the four positions described, the several 1. In a door check of the class described,

the combination of a cylinder, a double headed piston within the cylinder, bypasses in the end portions of the cylinder through which the liquid may pass during the advancing and retracting movements of (the piston, respectively, each of said bypasses having a port leading from the interior of the cylinder, and a single valve for controlling said ports with relation to. each other.

2. In a door check the combination of a cylinder, a double-headed piston Within .the cylinder, bypasses through which the liquid may pass during the advancing and retracting movements of the piston respectively, the bypass through which the liquid passes during the advancing movement of the piston having a port adapted to be closed by the piston as the piston approaches the limit of its advancing movement, and the bypass through which the liquid passes during the retracting movement of the piston having a plurality of ports spaced different distances from the rear end of the cylinder and the one furthest from said end of the cylinder being adapted to be closed by the piston during the latter portion of the retracting movement thereof and a single valve for controlling all of said ports wlth relation to each other.

3. In a door check of the class described, the combination of a cylinder, a double headed piston within the cylinder, a bypass in the rear end portion of the cylinder, said by asshaving a plurality of ports spaced dili erent distances from the rear end of the cylinder and at least one of said ports being adapted to be closed by the piston during the retracting movement of the piston, and a single valve means operable fromthe front of the cylinder for opening and closing said ports with relation to each other.

4. In a door check of the class described, the combination of a cylinder, a double headed piston within the cylinder, bypasses in the front and rear portions of the cylinder respectively, arranged in axial alinement, each of said bypasses havingat least one port, and avalve member extending through said bypasses for relatively opening. and closing said ports.

In testimony whereof, I have signed my name to this specification.

WALLACE F.'MO'ORE. 

